diff --git a/MANIFEST.in b/MANIFEST.in
index 8008b4507..99fc174bd 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -8,3 +8,4 @@ recursive-exclude spacy/lang *.json
 recursive-include spacy/lang *.json.gz
 recursive-include spacy/cli *.json *.yml
 recursive-include licenses *
+recursive-exclude spacy *.cpp